Pollen grain of Angiosperm is

Options

A. Monocolpate
B. Bicolpate
C. Tricolpate
D. Polycolpate

Answer

### Step-by-Step Solution:

1. **Understanding Pollen Grains**: Pollen grains are the male gametophytes in flowering plants (angiosperms) that play a crucial role in reproduction. They contain the male gametes.

2. **Definition of Culpus**: The term 'culpus' refers to a long furrow-like aperture on the surface of the pollen grain. This structure is important for classifying pollen grains.

3. **Types of Culpate Pollen Grains**:
- **Monocolpate**: Pollen grains with a single culpus (furrow).
- **Bicolpate**: Pollen grains with two colpates.
- **Tricolpate**: Pollen grains with three colpates.
- **Polycolpate**: Pollen grains with more than three colpates.

4. **Classification in Angiosperms**: In angiosperms, there are two primary types of pollen grains based on the number of colpates:
- **Monocolpate**: Typically found in monocots (e.g., grasses).
- **Tricolpate**: Generally found in dicots (e.g., roses, beans).

5. **Conclusion**: Based on the classification, the pollen grain of angiosperms is predominantly monocolpate, especially in monocots. Therefore, the answer to the question is that the pollen grain of angiosperms is **Monocolpate**.